Azure create user formatting

Hi I’m having some formatting issues with creating users in Azure with the app action. I’m using place holders from one of our service requests so that ‘display name’ field is:

{{firstname}} {{lastname}}

When entered like this, it adds a line break into Azure so it looks like this in the system:

{{firstname}}

{{lastname}}

I tried removing the space but of course it shows up with the first name and last name all together. I also tried using the encoded space:

{{firstname}}%20{{lastname}}

This way does not work either. Any ideas?