Streaming With A Wowza Account
Wowza requires users to input a lot more information than Switcher Studio allows, such as the username, password, and flash string version.
All that you need (and can enter) for Switcher Studio is the Stream Key and the Server URL. To stream with Wowza with Switcher Studio, you will need to turn off your account's extra authentication (security) features, and this will enable you to stream to Switcher Studio without any issues. You can either turn off the authentication yourself, or contact Wowza support and they will be able to do it.
After the authentication requirement is disabled, use the steps here to connect to Switcher Studio: https://switcherstudio-support.switcherstudio.com/article/32-setting-up-a-custom-rtmp-stream.