Could not serialize term %Kronky.Payload{messages: [], result: true, successful: true} as type Boolean

[annrapid]

Hi there,
I have a mutation which returns a boolean ( true or false). This is my mutation:

   field :revoke_token, :boolean do
      resolve(fn _, %{context: context} ->
        context[:current_user]
        |> Accounts.signout()
        {:ok, true}
      end)

and this is how I am calling it in react.

 <RevokeTokenMutation mutation={REVOKE_TOKEN}>
            {(revokeToken, { client }) => (
              <a className="navbar-item" href="#logout" onClick={this.logout(revokeToken, client)}>
                Sign out
              </a>
            )}
          </RevokeTokenMutation>

and logout function is

  private logout(revokeToken: Function, client: ApolloClient<any>) {
    return async (event: React.MouseEvent<HTMLElement>) => {
      event.preventDefault();
      const response: MutationResult<RevokeTokenData> = await revokeToken();

      console.log("Response " + response);
      const errors = response.data!.revokeToken.errors;
      if (!errors) {
        window.localStorage.removeItem('yummy:token');
        await client.resetStore();
        this.props.redirect('/', { notice: 'You are well disconnected' });
      }
    };
  }

I am unable to get past the error. Can I not use boolean type?