A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
Separate names with a comma.
In 2019.2, the fields are labeled better. - Edit > Project Settings > Player - Android tab > Other Settings > Identification section - Change...
I had this same problem with 2019.2 and VS2019. Then I noticed in the release notes, "Editor: Added VSCode, Visual Studio, and Rider code editor...