Add 3 fields for webinar

[HerbertIV]

No description provided.

[codecov]

Codecov Report

Merging #23 (7203cae) into main (ed20938) will increase coverage by 0.13%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##               main      #23      +/-   ##
============================================
+ Coverage     95.85%   95.98%   +0.13%     
- Complexity      180      186       +6     
============================================
  Files            30       30              
  Lines           482      498      +16     
============================================
+ Hits            462      478      +16     
  Misses           20       20              

Impacted Files	Coverage Δ
src/Services/WebinarService.php	99.27% <100.00%> (+0.09%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ed20938...7203cae. Read the comment docs.