Fix expiry date when generating invite link #545

[djaca]

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Description

It fixes format for expiry date when generating invite link.
Resolves #545

💔Thank you!

[codecov]

Codecov Report

Merging #547 into dev will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##                dev     #547   +/-   ##
=========================================
  Coverage     79.35%   79.35%           
  Complexity      546      546           
=========================================
  Files           146      146           
  Lines          1841     1841           
=========================================
  Hits           1461     1461           
  Misses          380      380

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[Hasnayeen]

Thanks for the PR