Creating Access token for transient username with more than 52 chars throws "Bad credentials" for docker login

Steps to reproduce:
1. Create an Access token as per  https://www.jfrog.com/confluence/display/RTF/Artifactory+REST+API#ArtifactoryRESTAPI-CreateToken for a transient username that contains 53 chars (for example:
rnrdlnvazlzajpkpfqljitzfbtvvzepppupkhrugxjjthxxyeokdl)
2. Use the output to perform a "docker login" with the transient username (rnrdlnvazlzajpkpfqljitzfbtvvzepppupkhrugxjjthxxyeokdl)

3. Notice the 401 Bad Creds error

*If we create an internal username with 53 chars, the issue is not reproduced. As well as in cases the transient username contains 52 chars. So, it seems it is only the case when using a transient username with more than 52 chars.