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It resolves the session, calls ",[453,623,458],{},", captures timing into ",[453,626,627],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[630,631,278],"h2",{"id":632},"options",[450,634,635,636,643],{},"Inherits all ",[637,638,640,642],"a",{"href":639},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[453,641,458],{}," options",", plus:",[645,646,647,666],"table",{},[648,649,650],"thead",{},[651,652,653,657,660,663],"tr",{},[654,655,656],"th",{},"Option",[654,658,659],{},"Type",[654,661,662],{},"Default",[654,664,665],{},"Description",[667,668,669,690,709,728],"tbody",{},[651,670,671,677,682,687],{},[672,673,674],"td",{},[453,675,676],{},"exclude",[672,678,679],{},[453,680,681],{},"string[]",[672,683,684],{},[453,685,686],{},"['\u002Fapi\u002Fauth\u002F**']",[672,688,689],{},"Route patterns to skip (glob).",[651,691,692,697,701,706],{},[672,693,694],{},[453,695,696],{},"include",[672,698,699],{},[453,700,681],{},[672,702,703],{},[453,704,705],{},"undefined",[672,707,708],{},"If set, only matching routes are resolved.",[651,710,711,716,721,725],{},[672,712,713],{},[453,714,715],{},"onIdentify",[672,717,718],{},[453,719,720],{},"(log, session) => void",[672,722,723],{},[453,724,705],{},[672,726,727],{},"Called after successful identification.",[651,729,730,735,740,744],{},[672,731,732],{},[453,733,734],{},"onAnonymous",[672,736,737],{},[453,738,739],{},"(log) => void",[672,741,742],{},[453,743,705],{},[672,745,746],{},"Called when no session is found.",[630,748,750],{"id":749},"route-filtering","Route Filtering",[450,752,753],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[461,755,757],{"className":463,"code":756,"language":466,"meta":467,"style":467},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[453,758,759,775,784,799,812,826,833],{"__ignoreMap":467},[471,760,761,763,765,767,769,771,773],{"class":473,"line":474},[471,762,516],{"class":515},[471,764,519],{"class":485},[471,766,522],{"class":481},[471,768,486],{"class":525},[471,770,528],{"class":485},[471,772,531],{"class":481},[471,774,534],{"class":481},[471,776,777,779,781],{"class":473,"line":505},[471,778,541],{"class":540},[471,780,544],{"class":481},[471,782,783],{"class":485}," [\n",[471,785,786,789,791,793,795],{"class":473,"line":512},[471,787,788],{"class":481},"    '",[471,790,553],{"class":498},[471,792,550],{"class":481},[471,794,531],{"class":481},[471,796,798],{"class":797},"sHwdD","     \u002F\u002F Better Auth itself\n",[471,800,801,803,805,807,809],{"class":473,"line":537},[471,802,788],{"class":481},[471,804,562],{"class":498},[471,806,550],{"class":481},[471,808,531],{"class":481},[471,810,811],{"class":797},"   \u002F\u002F Public endpoints\n",[471,813,814,816,819,821,823],{"class":473,"line":573},[471,815,788],{"class":481},[471,817,818],{"class":498},"\u002Fapi\u002Fhealth",[471,820,550],{"class":481},[471,822,531],{"class":481},[471,824,825],{"class":797},"      \u002F\u002F Health checks\n",[471,827,828,831],{"class":473,"line":594},[471,829,830],{"class":485},"  ]",[471,832,570],{"class":481},[471,834,835,837],{"class":473,"line":608},[471,836,611],{"class":481},[471,838,614],{"class":485},[450,840,841],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[461,843,845],{"className":463,"code":844,"language":466,"meta":467,"style":467},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[453,846,847,863,891],{"__ignoreMap":467},[471,848,849,851,853,855,857,859,861],{"class":473,"line":474},[471,850,516],{"class":515},[471,852,519],{"class":485},[471,854,522],{"class":481},[471,856,486],{"class":525},[471,858,528],{"class":485},[471,860,531],{"class":481},[471,862,534],{"class":481},[471,864,865,867,869,871,873,876,878,880,882,885,887,889],{"class":473,"line":505},[471,866,576],{"class":540},[471,868,544],{"class":481},[471,870,547],{"class":485},[471,872,550],{"class":481},[471,874,875],{"class":498},"\u002Fapi\u002Fdashboard\u002F**",[471,877,550],{"class":481},[471,879,531],{"class":481},[471,881,495],{"class":481},[471,883,884],{"class":498},"\u002Fapi\u002Faccount\u002F**",[471,886,550],{"class":481},[471,888,567],{"class":485},[471,890,570],{"class":481},[471,892,893,895],{"class":473,"line":512},[471,894,611],{"class":481},[471,896,614],{"class":485},[450,898,899,901,902,904,905,908,909,912,913,915,916,918],{},[453,900,696],{}," and ",[453,903,676],{}," use glob patterns (",[453,906,907],{},"*",", ",[453,910,911],{},"**","). Provide both if you need granular control — ",[453,914,676],{}," wins over ",[453,917,696],{},".",[630,920,922],{"id":921},"lifecycle-hooks","Lifecycle Hooks",[450,924,925,926,928],{},"Use ",[453,927,715],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[461,930,932],{"className":463,"code":931,"filename":465,"language":466,"meta":467,"style":467},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[453,933,934,950,977,1013,1040,1045,1050,1067,1092,1097],{"__ignoreMap":467},[471,935,936,938,940,942,944,946,948],{"class":473,"line":474},[471,937,516],{"class":515},[471,939,519],{"class":485},[471,941,522],{"class":481},[471,943,486],{"class":525},[471,945,528],{"class":485},[471,947,531],{"class":481},[471,949,534],{"class":481},[471,951,952,955,957,960,964,966,969,972,975],{"class":473,"line":505},[471,953,954],{"class":525},"  onIdentify",[471,956,544],{"class":481},[471,958,959],{"class":481}," (",[471,961,963],{"class":962},"sHdIc","log",[471,965,531],{"class":481},[471,967,968],{"class":962}," session",[471,970,971],{"class":481},")",[471,973,974],{"class":515}," =>",[471,976,534],{"class":481},[471,978,979,982,984,987,989,992,994,997,1000,1002,1005,1007,1010],{"class":473,"line":512},[471,980,981],{"class":477},"    if",[471,983,959],{"class":540},[471,985,986],{"class":485},"session",[471,988,918],{"class":481},[471,990,991],{"class":485},"user",[471,993,918],{"class":481},[471,995,996],{"class":485},"plan",[471,998,999],{"class":481}," ===",[471,1001,495],{"class":481},[471,1003,1004],{"class":498},"enterprise",[471,1006,550],{"class":481},[471,1008,1009],{"class":540},") ",[471,1011,1012],{"class":481},"{\n",[471,1014,1015,1018,1020,1023,1026,1029,1032,1034,1036,1038],{"class":473,"line":537},[471,1016,1017],{"class":485},"      log",[471,1019,918],{"class":481},[471,1021,1022],{"class":525},"set",[471,1024,1025],{"class":540},"(",[471,1027,1028],{"class":481},"{",[471,1030,1031],{"class":540}," _forceKeep",[471,1033,544],{"class":481},[471,1035,603],{"class":602},[471,1037,489],{"class":481},[471,1039,614],{"class":540},[471,1041,1042],{"class":473,"line":573},[471,1043,1044],{"class":481},"    }\n",[471,1046,1047],{"class":473,"line":594},[471,1048,1049],{"class":481},"  },\n",[471,1051,1052,1055,1057,1059,1061,1063,1065],{"class":473,"line":608},[471,1053,1054],{"class":525},"  onAnonymous",[471,1056,544],{"class":481},[471,1058,959],{"class":481},[471,1060,963],{"class":962},[471,1062,971],{"class":481},[471,1064,974],{"class":515},[471,1066,534],{"class":481},[471,1068,1070,1073,1075,1077,1079,1081,1084,1086,1088,1090],{"class":473,"line":1069},8,[471,1071,1072],{"class":485},"    log",[471,1074,918],{"class":481},[471,1076,1022],{"class":525},[471,1078,1025],{"class":540},[471,1080,1028],{"class":481},[471,1082,1083],{"class":540}," anonymous",[471,1085,544],{"class":481},[471,1087,603],{"class":602},[471,1089,489],{"class":481},[471,1091,614],{"class":540},[471,1093,1095],{"class":473,"line":1094},9,[471,1096,1049],{"class":481},[471,1098,1100,1102],{"class":473,"line":1099},10,[471,1101,611],{"class":481},[471,1103,614],{"class":485},[450,1105,1106,1107,1109,1110,1112,1113,1115],{},"Hooks fire after the session is resolved and ",[453,1108,458],{}," has set its fields. They run on every request that passes the ",[453,1111,696],{},"\u002F",[453,1114,676],{}," filter, so keep them fast and side-effect-free.",[1117,1118,1119,1124],"tip",{},[450,1120,1121,1122,544],{},"Common patterns for ",[453,1123,715],{},[1125,1126,1127,1131,1134],"ul",{},[1128,1129,1130],"li",{},"Force-keep audit logs for admins or high-value plans.",[1128,1132,1133],{},"Tag the request with feature flags or tenant info loaded from the session.",[1128,1135,1136],{},"Increment a per-user counter for billing.",[630,1138,1140],{"id":1139},"error-handling","Error Handling",[450,1142,1143,1144,1147,1148,901,1150,1153],{},"The middleware catches every error from ",[453,1145,1146],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[453,1149,627],{},[453,1151,1152],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1155,1156,1157],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":467,"searchDepth":505,"depth":505,"links":1159},[1160,1161,1162,1163],{"id":632,"depth":505,"text":278},{"id":749,"depth":505,"text":750},{"id":921,"depth":505,"text":922},{"id":1139,"depth":505,"text":1140},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1167,1170],{"label":302,"icon":305,"to":303,"color":1168,"variant":1169},"neutral","subtle",{"label":316,"icon":319,"to":317,"color":1168,"variant":1169},{},{"title":307,"icon":310},{"title":445,"description":1164},"Ft-jGRp0Xs3NjYmYAXhrK-z4jsNG1S1GJbOMZWpMh0E",[1176,1178],{"title":302,"path":303,"stem":304,"description":1177,"icon":305,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":312,"path":313,"stem":314,"description":1179,"icon":262,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1780168571442]