You Don't Seem To Have A Generator With "Teams" Installed

Introduction

When running the command yo teams for teams development app, you might have seen the below error.

This is due to the yomen generator for teams is not installed here. Please note that setting up SPFx environment will not install other yeomen generators for teams. you need to install the yeomen generator for teams by running the below command. If you see in the error screenshot the directions are already given there. 

npm install generator-teams

References