Description of problem:
toolbox enter doesn't work with AD users that contains @ "at" sign

Version-Release number of selected component (if applicable):
$ toolbox --version
toolbox version 0.0.99.4

How reproducible:
Always

Steps to Reproduce:
1. Create an AD user that has @ "at" sign
2. Run a toolbox container

Actual results:
$ toolbox create test_toolbox
Created container: test_toolbox
Enter with: toolbox enter test_toolbox

$ toolbox enter test_toolbox
Error: invalid entry point PID of container test_toolbox

$ podman start --attach test_toolbox
...
passwd: Libuser error at line: 210 - name contains invalid char `@'.
Error: failed to remove password for user x123456@DOMAIN: failed to invoke passwd(1)

Expected results:

• toolbox should work with AD users containing @ "at" sign

Additional info: