docs: def get_commit_tree(profile, sha):
      """Get the SHA of a commit's tree.
  
      Args:
  
          profile
              A profile generated from ``simplygithub.authentication.profile``.
              Such profiles tell this module (i) the ``repo`` to connect to,
              and (ii) the ``token`` to connect with.
  
          sha
              The SHA of a commit.
  
      Returns:
          The SHA of the commit's tree.
  
      """
      data = commits.get_commit(profile, sha)
      tree = data.get("tree")
      sha = tree.get("sha")
      return sha