title: slack-ruby-client: invalid_user with users_profile_set
body: <p>I've got <strong>Slack::Web::Api::Error: invalid_user</strong> with users_profile_set method. I have 2 users, and my find_user method (return response with user info) - works well for them. But if I want change status (the same for this cases) - for one user everything is correct, for the second - I've got this error.</p>
  
  <p>Example of call users_profile_set method:</p>
  
  <pre><code>client.users_profile_set(user: find_user.id, profile: status.to_json)
  </code></pre>
  
  <p>My example status hash:</p>
  
  <pre><code>{:status_text=&gt;"Remote - Today", :status_emoji=&gt;":house_with_garden:"}
  </code></pre>
  
  <p>find_user:</p>
  
  <pre><code>client.users_list.members.find { |member| member.profile.email == user.email }
  </code></pre>
  
  <p>What did I do wrong?</p>