Add a two-word user name to sudoer

Running a MacBook Pro 2016, MacOS Monterey v 12.7.6. I need to add a username with admin privileges to allow that user to run a specific program, VeraCrypt, as explained here . In summary, one adds this line to the sudoers user section:

your-non-admin-username ALL = (ALL) /Applications/VeraCrypt.app/Contents/MacOS/VeraCrypt

The username has a space in it, like (not the real username) "Clark K". I tried entering this:

Clark K ALL = (ALL) /Applications/VeraCrypt.app/Contents/MacOS/VeraCrypt

When I do this, Visudo gives me a syntax error message without specifying what the syntax problem is. I am guessing it has to do with the two-word username. How do I deal with this? I have command line experience in Linux, but getting under the hood of the Mac is new to me. Thanks in advance!