gnutls_psk_set_server_credentials_hint - API function
int gnutls_psk_set_server_credentials_hint(gnutls_psk_server_credentials_t res, const char * hint);
This function sets the identity hint, in a gnutls_psk_server_credentials_t type. This hint is sent to the client to help it chose a good PSK credential (i.e., username and password).
On success, GNUTLS_E_SUCCESS (0) is returned, otherwise an error code is returned.
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