improve README

README.md

@@ -107,20 +107,31 @@ This API call can only be made once after the service has started. Subsequent ca
 ### User Operations
 
 #### Register User
-POST `/api/admin/user/register`
+POST `/api/admin/user/add`
 
-Data
+Create a new user record by specifying groupId
+Body
 ```
 {
-    "username": "", 
-    "password": "",
-    "RoleId": 2
+    "userName": "Test User", 
+    "password": "Example Password",
+    "groupId": "1",
 }
 ```
 
-OLD: This operation can only be performed by a user with a role that is admin enabled. There are 3 built in roles, which can be viewed via the `/api/admin/roles` endpoint.
+Create a new user record by specifying groupName
+Body
+```
+{
+    "userName": "Test User", 
+    "password": "Example Password",
+    "groupName": "Users",
+}
+```
 
-NEW: This operation can only be performed by a user that is a member of a group with the admin flag enabled.
+Registering a user requires specifying the group to which the user will belong. There are 2 built-in groups, with groupName of 'Administrators' or 'Users' and corresponding groupId of 1 and 2 respectively. Available groups can be retrieved via the `/api/admin/groups/list`
+
+This operation can only be performed by a user that is a member of a group with the admin flag enabled, or a user who has the admin flag enabled individually on their database record.
 
 #### Remove User
 POST `/api/admin/user/delete`
@@ -134,13 +145,21 @@ Data
 
 This operation can only be performed by a user with a role that is admin enabled. Removes user account corresponding to specified userName.
 
-
 #### List Users
 GET `/api/admin/users`
 
 This operation can only be performed by a user with a role that is admin enabled. Lists currently defined users.
 
-### Role Operations
+### Group Operations
+
+#### List Groups
+GET `/api/admin/groups/list`
+
+This operations has not yet been implemented. 
+
+This operation can only be performed by a user with a role that is admin enabled. Lists currently defined groups.
+
+### Role Operations - Deprecated
 
 #### List Roles
 GET `/api/admin/roles`