You can delete them in the console if you have admin rights. Here are some steps to guide you:
1.Access the console and navigate to the credentials tab.
2.Search for the specific credentials you wish to delete and select the checkbox next to them.
3.Once selected, you'll see the option to delete them.
If the credentials have associated statements and/or meters, those need to be deleted first before you can delete the credentials. You can watch a short video example here.