This is an sha1 key generated as a signature on the call of the function, just a precaution to open API Functions like these.
The following statement is how a passhash that is required to be provided for the API function to call.
Valid Passhash is generated with: sha1( ( [time] - [rand] ) . [uname] . [pass] )
Wiki: auth
Wiki: pass
Wiki: rand
Wiki: time
Wiki: uname
Wiki: user