How do I get a cite format [Lastname year] and corresponding reference list

Question

I have been trying to find out how to make citations to look like

[Lastname year]

in the text. As an example:

The results are from [Smith 2016].

And in the references the list would have a line.

[Smith 2016] Smith, A.J, Results, Journal 5 (2016).

How can I do that?

And no, "et al." cannot ne visible, not like this:

The results are from [Smith et al. 2016].

At this point any command that gets rid of that "et al." is acceptable, even multiplatform post processing.

Answer 1

The answer https://tex.stackexchange.com/a/420601/191948 can be tweaked to remove the "et al.":

\documentclass{article}

\usepackage[sorting=nty,style=alphabetic]{biblatex} 
\renewcommand{\labelalphaothers}{}
\DeclareLabelalphaTemplate[]{\labelelement{\field[names=1]{author}}
                             \labelelement{\literal{\addspace}}
                             \labelelement{\field{year}}
                             }

\addbibresource{biblatex-examples.bib}


\begin{document}


\cite{sigfridsson}
\printbibliography


\end{document}