Change default for role parameter of add user API

Author: claudisa-uu

groups.py

@@ -1132,7 +1132,7 @@ def api_group_user_is_member(ctx: rule.Context, username: str, group_name: str)
     return group_user_exists(ctx, group_name, username, True)
 
 
-def group_user_add(ctx: rule.Context, username: str, group_name: str, role: str | None = None) -> api.Result:
+def group_user_add(ctx: rule.Context, username: str, group_name: str, role: str = "normal") -> api.Result:
     """Add a user to a group.
 
     :param ctx:        Combined type of a ctx and rei struct
@@ -1169,16 +1169,13 @@ def group_user_add(ctx: rule.Context, username: str, group_name: str, role: str
                 # Mark user as invited.
                 msi.sudo_obj_meta_add(ctx, username, "-u", constants.UUORGMETADATAPREFIX + "sram_invited", group_name, "", "")
 
-            # If a role was provided, assign role to new user
-            if role is not None:
+            # If a role other than normal/member was provided, assign role to new user (normal/member is assigned by default)
+            if role != "normal" and role != "member":
                 # Redifine role
                 if role == "viewer":
                     role = "reader"
-                elif role == "member":
-                    role = "normal"
 
-                if role != "normal":  # Normal/member is assigned to new user by default
-                    return group_user_update_role(ctx, username, group_name, role)
+                return group_user_update_role(ctx, username, group_name, role)
 
             return api.Result.ok()
         else:
@@ -1188,7 +1185,7 @@ def group_user_add(ctx: rule.Context, username: str, group_name: str, role: str
 
 
 @api.make()
-def api_group_user_add(ctx: rule.Context, username: str, group_name: str, role: str | None = None) -> api.Result:
+def api_group_user_add(ctx: rule.Context, username: str, group_name: str, role: str = "normal") -> api.Result:
     """Add a user to a group.
 
     :param ctx:        Combined type of a ctx and rei struct