public void exposeKey(UserTOTPKey key) {
        this.key = key;
    }
Exposes the given key to facilitate enrollment.

@param key
    The TOTP key to expose to the user for the sake of enrollment.
extensions/guacamole-auth-totp/src/main/java/org/apache/guacamole/auth/totp/form/AuthenticationCodeField.java