google-auth >= 1.1.0
google-cloud-core >= 0.27.0, < 0.28dev
google-gax>=0.15.15, <0.16dev
googleapis-common-protos[grpc]>=1.5.2, <2.0dev
grpc-google-iam-v1>=0.11.4, <0.12dev
requests>=2.18.4, <3.0dev
