Add support for Alipay's new user identity openid

src/AspNet.Security.OAuth.Alipay/AlipayAuthenticationConstants.cs

@@ -25,5 +25,16 @@ public static class Claims
         /// The user's gender. F: Female; M: Male.
         /// </summary>
         public const string Gender = "urn:alipay:gender";
+
+        /// <summary>
+        /// OpenID is the unique identifier of Alipay users in the application dimension.
+        /// See https://opendocs.alipay.com/mini/0ai2i6
+        /// </summary>
+        public const string OpenId = "urn:alipay:open_id";
+
+        /// <summary>
+        /// Alipay user system internal identifier, will no longer be independently open in the future, and will be replaced by OpenID.
+        /// </summary>
+        public const string UserId = "urn:alipay:user_id";
     }
 }

src/AspNet.Security.OAuth.Alipay/AlipayAuthenticationHandler.cs

@@ -134,8 +134,6 @@ protected override async Task<AuthenticationTicket> CreateTicketAsync(
             throw new AuthenticationFailureException($"An error (Code:{code}) occurred while retrieving user information.");
         }
 
-        identity.AddClaim(new Claim(ClaimTypes.NameIdentifier, mainElement.GetString("user_id")!, ClaimValueTypes.String, Options.ClaimsIssuer));
-
         var principal = new ClaimsPrincipal(identity);
         var context = new OAuthCreatingTicketContext(principal, properties, Context, Scheme, Options, Backchannel, tokens, mainElement);
 

src/AspNet.Security.OAuth.Alipay/AlipayAuthenticationOptions.cs

@@ -29,5 +29,14 @@ public AlipayAuthenticationOptions()
         ClaimActions.MapJsonKey(Claims.Gender, "gender");
         ClaimActions.MapJsonKey(Claims.Nickname, "nick_name");
         ClaimActions.MapJsonKey(Claims.Province, "province");
+        ClaimActions.MapJsonKey(Claims.OpenId, "open_id");
+        ClaimActions.MapJsonKey(Claims.UserId, "user_id");
+        ClaimActions.MapCustomJson(System.Security.Claims.ClaimTypes.NameIdentifier, user => user.GetString(NameIdentifierKey));
     }
+
+    /// <summary>
+    /// Alipay user system internal identifier, which will no longer be open independently in the future and will be replaced by open_id. Currently the default is user_id
+    /// See https://opendocs.alipay.com/mini/0ai2i6?pathHash=13dd5946
+    /// </summary>
+    public string NameIdentifierKey { get; set; } = "user_id";
 }