This song by John Legend is in Ab.
These are the “cheat” chords I played…
Part 1a: Fm7 - Db2 - Ab - Eb
Part 1b: same as Part 1a
Part 1c: same as Part 1a
Part 1d: same as Part 1a
Part 2a: Bbm7 - Ab - Eb
Part 2b: same as Part 2a
Part 3a: Ab - Fm7 - Db2 - [...]
