This tutorial shows how to use Postman to add Base64 encoded Authorization Header with Username & Password.
● Encode Username & Password (using Online Service)
● Add Authorization Header (in Postman using generated string from previous step)
Postman will send HTTP Request to Spring Boot Application created in Login Form - Default tutorial (so you should start it)
https://www.base64encode.org
Encode to Base64 format: user:d255f064-6a4b-49bd-af08-766259e7895c
Encode dXNlcjpkMjU1ZjA2NC02YTRiLTQ5YmQtYWYwOC03NjYyNTllNzg5NWM=