Docs: Add group saml identity API response info

doc/api/members.md

@@ -45,7 +45,8 @@ Example response:
     "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
     "web_url": "http://192.168.1.8:3000/root",
     "expires_at": "2012-10-22T14:13:35Z",
-    "access_level": 30
+    "access_level": 30,
+    "group_saml_identity": null
   },
   {
     "id": 2,
@@ -55,7 +56,12 @@ Example response:
     "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
     "web_url": "http://192.168.1.8:3000/root",
     "expires_at": "2012-10-22T14:13:35Z",
-    "access_level": 30
+    "access_level": 30,
+    "group_saml_identity": {
+      "extern_uid":"ABC-1234567890",
+      "provider": "group_saml",
+      "saml_provider_id": 10
+    }
   }
 ]
 ```
@@ -94,7 +100,8 @@ Example response:
     "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
     "web_url": "http://192.168.1.8:3000/root",
     "expires_at": "2012-10-22T14:13:35Z",
-    "access_level": 30
+    "access_level": 30,
+    "group_saml_identity": null
   },
   {
     "id": 2,
@@ -105,6 +112,11 @@ Example response:
     "web_url": "http://192.168.1.8:3000/root",
     "expires_at": "2012-10-22T14:13:35Z",
     "access_level": 30
+    "group_saml_identity": {
+      "extern_uid":"ABC-1234567890",
+      "provider": "group_saml",
+      "saml_provider_id": 10
+    }
   },
   {
     "id": 3,
@@ -114,7 +126,8 @@ Example response:
     "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
     "web_url": "http://192.168.1.8:3000/root",
     "expires_at": "2012-11-22T14:13:35Z",
-    "access_level": 30
+    "access_level": 30,
+    "group_saml_identity": null
   }
 ]
 ```
@@ -149,7 +162,8 @@ Example response:
   "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
   "web_url": "http://192.168.1.8:3000/root",
   "access_level": 30,
-  "expires_at": null
+  "expires_at": null,
+  "group_saml_identity": null
 }
 ```
 
@@ -185,7 +199,8 @@ Example response:
   "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
   "web_url": "http://192.168.1.8:3000/root",
   "access_level": 30,
-  "expires_at": null
+  "expires_at": null,
+  "group_saml_identity": null
 }
 ```
 
@@ -221,7 +236,8 @@ Example response:
   "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
   "web_url": "http://192.168.1.8:3000/root",
   "expires_at": "2012-10-22T14:13:35Z",
-  "access_level": 30
+  "access_level": 30,
+  "group_saml_identity": null
 }
 ```
 
@@ -257,7 +273,8 @@ Example response:
   "avatar_url": "https://www.gravatar.com/avatar/c2525a7f58ae3776070e44c106c48e15?s=80&d=identicon",
   "web_url": "http://192.168.1.8:3000/root",
   "expires_at": "2012-10-22T14:13:35Z",
-  "access_level": 40
+  "access_level": 40,
+  "group_saml_identity": null
 }
 ```
 

doc/user/group/saml_sso/index.md

@@ -295,6 +295,8 @@ For convenience, we've included some [example resources](../../../administration
 
 In troubleshooting the Group SAML setup, any authenticated user can use the API to verify the NameID GitLab already has linked to the user by visiting [https://gitlab.com/api/v4/user](https://gitlab.com/api/v4/user) and checking the `extern_uid` under identities.
 
+Similarly, group members of a role with the appropriate permissions can make use of the [members API](../../../api/members.md) to view group SAML identity information for members of the group.
+
 This can then be compared to the [NameID](#nameid) being sent by the Identity Provider by decoding the message with a [SAML debugging tool](#saml-debugging-tools). We require that these match in order to identify users.
 
 ### Message: "SAML authentication failed: Extern uid has already been taken"