Jitsi link generation broken with unusual names
# Summary <!--Describe the bug in short here. Describe what happens that is considered bad behaviour.--> When a students with an unusual name (e.g. with a `'` in the name) creates a new request with an automatically generated Jitsi link, this link will give a 404. # Steps to reproduce <!--Describe the steps required to reproduce the bug. An enumeration with screenshots is preferred to be able to easily reproduce.--> 1. Login with a user which has `'` in the name. 2. Create a new request which has Jitsi as room. 3. Enter the generated Jitsi room and see the 404. # Possible Fix <!--If you have a suspicion of what might be wrong, describe what you think is going wrong.--> Remove all the alphanummeric characters from the name before using it to generate the Jitsi room name. # Logs <!--Logs can be added if you find a bug and already have a log output to show.--> <!--In case you do, please copy the log between the code tags below.--> <description><code> </code></description>
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