Try again wallet creation is not working

[NejcZdovc]

Description

Steps to Reproduce

1. pull the plug from the internet as soon as you click on join now
2. plug it again after few minutes
3. you will get error

Actual result:

try again doesn't do anything. You get this error in the terminal > response: {"statusCode":422,"error":"Unprocessable Entity","message":"persona credential exists: db1347beebe1e119fe1442086d044cf"}> headers cache-control: no-cache

Expected result:

Try again should clear state and start from scratch

Reproduces how often:

Brave version (brave://version info)

Reproducible on current release:

• Does it reproduce on brave-browser dev/beta builds?

Website problems only:

• Does the issue resolve itself when disabling Brave Shields?
• Is the issue reproducible on the latest version of Chrome?

Additional Information

Brave-Browser-Development.zip

[NejcZdovc]

+1 from #3646

[btlechowski]

Verification passed on

Brave	0.62.25 Chromium: 73.0.3683.67 (Official Build) beta (64-bit)
Revision	a83fd4f3207ae83412d329a9ca1239dd1e068345-refs/branch-heads/3683@{#760}
OS	Windows 7 Service Pack 1 Build 7601.24312

Used test plan from brave/brave-core#1839
Used profile from https://github.com/brave/brave-browser/files/2890008/Brave-Browser-Development.zip

Brave Panel:

brave://rewards

Verified passed with

Brave	0.62.31 Chromium: 73.0.3683.75 (Official Build) beta(64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Mac OS X

• Verified test plan from Fixes corrupt wallet brave-core#1839 using profile from description

Verification passed on

Brave	0.62.27 Chromium: 73.0.3683.75 (Official Build) beta(64-bit)
Revision	909ee014fcea6828f9a610e6716145bc0b3ebf4a-refs/branch-heads/3683@{#803}
OS	Linux