Performs a logout from Af-Arch environment.
Function used to get logged out from the system. Before doing all stuff needed while using services from other Af-Arch nodes, a logout request is required.
See also the afdal_session_login documentation to know more about how to use this function. It has an example which can be used easily to implement a logout process as the login process is implemented on that example.
|usr_function ||function to be executed when the server response arrives. |
|usr_data ||user data passed to user_function.|
- TRUE if the query was executed, or FALSE if it wasn't