How do I get the credentials to start using this library?

[estebanr710]

I am new to Microsoft services and I need to do an integration from a business app developed in PHP to a directory on a site in a business SharePoint. I already have administrator permissions in SharePoint, I appreciate your cooperation.

[meltir]

Have you tried following https://docs.microsoft.com/en-us/sharepoint/dev/solution-guidance/security-apponly-azureacs ? (from https://github.com/vgrem/phpSPO#authentication)

I have not done this myself (we have a team that handles sharepoint and they followed the above steps), but it is working fine for me.