code: @Nullable
      public String getIdentityPublicKey() {
          RSAPublicKey key = InstanceIdentityProvider.RSA.getPublicKey();
          return key == null ? null : new String(Base64.encodeBase64(key.getEncoded()), Charset.forName("UTF-8"));
      }
docs: Gets the Base64 encoded public key that forms part of this instance's identity keypair.
  @return the Base64 encoded public key
  @since 2.16