title: natbib author-year citation - fallback to editor possible when author missing?
body: <p>I'm having an issue with the natbib package. When the bib entry is missing an author I want to display the editor instead. However the second citation just takes the first three letters of the bib-key instead of the author.</p>
  <p>Sample tex:</p>
  <pre><code>\documentclass{article}
  \usepackage[authoryear,round]{natbib}
  \bibliographystyle{abbrvnat}
  
  \begin{document}
  
  I need this \citet[S.~2]{Test1} to look like Surname (2022, S. 2).
  and this \citep{Test1} like (Surname, 2022)
  
  But also this \citet[S.~2]{Test2} to look like Editor (2022, S. 2).
  and this \citep{Test2} like (Editor, 2022)
  but it just prints (Tes, 2022)
  
  \bibliography{refs}
  
  \end{document}
  </code></pre>
  <p>The bib file could look like this:</p>
  <pre><code>@misc{Test1,
      author={Surname, Name}
      title = {Sometitle},
      year = {2022}
  }
  @misc{Test2,
      title = {Someothertitle},
      editor={{Editor, Name}}
      year = {2022}
  }
  </code></pre>
  <p>Can anyone help with this? I'd also switch to another package than natbib, since I'm still early on the project. But at a first glance it seemed to meet my needs quite well.
  Also I don't really know what I'm doing, it's been a while since I've been working with Latex. So sorry for that in advance!</p>