Feat/workflow phase2 (#4687)

api/libs/helper.py

@@ -46,7 +46,13 @@ def uuid_value(value):
         error = ('{value} is not a valid uuid.'
                  .format(value=value))
         raise ValueError(error)
-
+    
+def alphanumeric(value: str):
+    # check if the value is alphanumeric and underlined
+    if re.match(r'^[a-zA-Z0-9_]+$', value):
+        return value
+    
+    raise ValueError(f'{value} is not a valid alphanumeric value')
 
 def timestamp_value(timestamp):
     try: