Better debug

service/models_pods.py

@@ -132,11 +132,11 @@ def check_tapis_auth_forward_cookies(cls, v):
     def check_tapis_auth_return_path(cls, v):
         if v:
             # Regex match to ensure url is safe with only [A-z0-9.-/] chars.
-            res = re.fullmatch(r'[a-z][a-z0-9.-/]+', v)
+            res = re.fullmatch(r'[A-Za-z][a-z0-9.-_/]+', v)
             if not res:
-                raise ValueError(f"networking.tapis_auth_return_path can only contain lowercase alphanumeric characters, periods, forward-slash, and hyphens.")
+                raise ValueError(f"networking.tapis_auth_return_path can only contain alphanumeric characters, periods, forward-slash, underscores, and hyphens. Got {v}")
             if len(v) > 180:
-                raise ValueError(f"networking.tapis_auth_return_path length must be below 180 characters. Inputted length: {len(v)}")
+                raise ValueError(f"networking.tapis_auth_return_path length must be below 180 characters. Got length: {len(v)}")
         return v
 
     @validator('tapis_auth_allowed_users')