Asynchronously look up a certificate by its handle in the database. See gio.tls_database.TlsDatabase.lookupCertificateForHandle for more information.
a certificate handle
used to interact with the user if necessary
Flags which affect the lookup.
a #GCancellable, or null
callback to call when the operation completes
Asynchronously look up a certificate by its handle in the database. See gio.tls_database.TlsDatabase.lookupCertificateForHandle for more information.