title: Ansible can't register output
body: <pre><code>TASK [teamcity_backup : Create TeamCity backup via API] *****************************************************************************************************************************
  ok: [138.201.152.166] =&gt; {"cache_control": "no-store", "changed": false, "connection": "close", "content": "ScheduledBackup_20170929_015922.zip", "content_type": "text/plain", "cookies": {"TCSESSIONID": "99E068D2587365EA57823B81D8A2FE0A"}, "date": "Thu, 28 Sep 2017 23:59:22 GMT", "failed": false, "msg": "OK (unknown bytes)", "redirected": false, "server": "Apache-Coyote/1.1", "set_cookie": "TCSESSIONID=99E068D2587365EA57823B81D8A2FE0A; Path=/; HttpOnly, RememberMe=\"\"; Expires=Thu, 01-Jan-1970 00:00:10 GMT; Path=/; HttpOnly", "status": 200, "transfer_encoding": "chunked", "url": "http://teamcity:8111/httpAuth/app/rest/server/backup?includeConfigs=true&amp;includeDatabase=true&amp;includeBuildLogs=false&amp;fileName=ScheduledBackup"}
  
  TASK [teamcity_backup : debug] ******************************************************************************************************************************************************
  ok: [138.201.152.166] =&gt; {
      "data_c": "VARIABLE IS NOT DEFINED!"
  }
  </code></pre>
  
  <p>here http response body:</p>
  
  <pre><code>"content": "ScheduledBackup_20170929_015922.zip"
  </code></pre>
  
  <p>data_c is not defined, but I don't understand why... can you help me?</p>
  
  <p>role/name/task/main.yml:</p>
  
  <pre><code>- name: Create TeamCity backup via API
    uri:
      url: 'http://teamcity:8111/httpAuth/app/rest/server/backup?includeConfigs=true&amp;includeDatabase=true&amp;includeBuildLogs=false&amp;fileName=ScheduledBackup'
      method: POST
      user: "{{ teamcity_backup_user }}"
      password: "{{ teamcity_backup_user_password }}"
      force_basic_auth: yes
      return_content: yes
      register: data_c
  
  - debug: var=data_c
  </code></pre>