Add sign out button

models/sessions.go

@@ -85,6 +85,15 @@ func (ss *SessionService) Create(userID int) (*Session, error) {
 	return &session, nil
 }
 
+func (ss *SessionService) Delete(token string) error {
+	tokenHash := hash(token)
+	_, err := ss.DB.Exec(`DELETE FROM sessions WHERE token_hash = $1;`, tokenHash)
+	if err != nil {
+		return fmt.Errorf("delete: %w", err)
+	}
+	return nil
+}
+
 func (ss *SessionService) User(token string) (*User, error) {
 	token_hash := hash(token)
 	var user User