fix: handle is_active field as both string and boolean in JWT tokens

[swarna1101]

Problem

• Users getting "your account is inactive" error despite being activated in Auth0
• Issue started last week with existing RC4 binaries that were previously working
• Auth0 recently changed JWT token format: is_active now comes as string "true" instead of boolean true

Cause

In the existing code:

IsActive: claims["is_active"] == true,