make sure phone numbers are entered with country code

[stefanomasini]

otherwise Signal integration will not work

[HansStroes]

Maybe you should set a warning somewhere. When I saw this issue I changed my phonenumber to international notation and now the Space Bot recognizes me;)

[Lukelectro]

SpaceBot does not want to talk to me, despite prepending +31 to my phone number. Tried 0031 too -> got error 500. Number without +31 -> error 500. Number with +31 is accepted, but when sending a test message with the button I don't receive it, and when sending "Who?" or "Why is bot b0rked?" I get no response from the bot.