getEvent should resolve(null) when 0 matches are found
Fetching an existing user works:
wget --header='accept:application/json' https://mostr.pub/users/8685ebef665338dd6931e2ccdf3c19d9f0e5a1067c918f22e7081c2558f8faf8
But try fetching a non-existing user:
wget --header='accept:application/json' https://mostr.pub/users/8685ebef665338dd6931e2ccdf3c19d9f0e5a1067c918f22e7081c2558f8faf9
This PR fixes that.