pub unsafe extern "C" fn ditto_auth_client_make_login_provider( ctx: *mut c_void, retain: Option<unsafe extern "C" fn(_: *mut c_void)>, release: Option<unsafe extern "C" fn(_: *mut c_void)>, expiring_cb: Option<unsafe extern "C" fn(_: *mut c_void, _: c_uint)>) -> BoxedLoginProvider