Find single user, by his/her username
Retrieve information on a single user, referencing him by his username.
IMPORTANT: user IDs don't change, but usernames may change.
Usually, you'll want to run this method only once, in order to get the IDs of referenced users. You should not store usernames in your database, it is much safer to reference them by their IDs.
|username||required||Name of the user.|
Same as in the services/users/user method. Pipe-separated list of field names which you are interested with. See services/users/user method for a list available values.
|format||optional||Standard common formatting argument.|
|callback||optional||Standard common formatting argument.|
|Plus required consumer_key argument, assigned for your application.|
A dictionary of fields you have selected.
If given user does not exist, the method will respond with an HTTP 400 error.