Function libgit2_sys::git_cred_userpass

pub unsafe extern fn git_cred_userpass(cred: *mut *mut git_cred,
                                       url: *const c_char,
                                       user_from_url: *const c_char,
                                       allowed_types: c_uint,
                                       payload: *mut c_void)
                                       -> c_int