Merge branch '194-saving-user-fails-because-of-partial-tags-implementation' into 'main'

Resolve "Saving user fails because of partial tags implementation"

Closes #194

See merge request !173

backend/areas/users/user_service.py

@@ -99,7 +99,7 @@ class UserService:
 
                 db.session.add(app_role)
 
-        if data.get("tags"):
+        if data.get("tags") is not None:
             UserStackspinData.setTags(res["id"], data["tags"])
 
         # Commit all changes to the stackspin database.
@@ -165,7 +165,7 @@ class UserService:
                     )
                     db.session.add(appRole)
 
-        if data["tags"]:
+        if data.get("tags") is not None:
             UserStackspinData.setTags(id, data["tags"])
 
         db.session.commit()
@@ -202,7 +202,7 @@ class UserService:
                         db.session.add(appRole)
                         db.session.commit()
 
-            if user_data["tags"]:
+            if user_data.get("tags") is not None:
                 UserStackspinData.setTags(user_data["id"], user_data["tags"])
 
             return cls.get_user(user_data["id"])