Voicemail Issues

Is there any way to use uploaded system recordings as the voicemail recordings? I’ve been exploring the options and have the system recording working in the IVR.

Also, if this is a solution, I tried clicking on the ‘Recordings’ tab in freepbx which leads me to believe there might be an option in there. However, we dont have the login information. Whoever set it up (long time ago) left without leaving the details. How would I got about resetting this and gaining access?

Thanks in advance for your help and time.