set_credentials
Description:
Sets credentials to use for connection.
 Using null for credentials unsets previous value.
Parameters:
| this | an SoupSession | 
| credentials | an NamedParameters with credentials to use, or  | 
Sets credentials to use for connection.
 Using null for credentials unsets previous value.
| this | an SoupSession | 
| credentials | an NamedParameters with credentials to use, or  |