What key is this song in?

[SmallCityBlue]

Im trying to figure out what key minnie riperton's loving you is in. I thought it was something like a gmin but im not sure. I sampled the la la la las and need to match it with my 808s and mabey strings or something, can i get some help.

 

[bandcoach]

Dmaj7-C#m7-Bm7-Amaj7 x 8

Bm7-C#m7-Bm7-Amja7
Bm7-C#m7-Bm7-C#m7-Dmaj7-E7

then repeat the above two sections as needed

notes in chords
Bm7 ~ B-D-F#-A
C#m7 ~ C#-E-G#-B
Amja7 ~ A-C#-E-G#
Dmaj7 ~ D-F#-A-C#
E7 ~ E-G#-B-D