Important information:
Please see the following links concerning the AUR;
The first link demonstrates how to setup and use the AUR in Manjaro. The second, is a deep dive into your responsibilities when using the AUR, plus much more information you might not have been previously aware of.
- Arch User Repository (AUR) (Manjaro Wiki)
- [Need-To-Know] About Manjaro and AUR
I hope these are useful.
Regards.