With over 6 years of Full Stack development experience under my belt, primarily in Django and React, I am incredibly well-suited to solve your GraphQL user registration issue. It seems like the authentication process is faltering on the React frontend, and I have a comprehensive understanding of the stack you've implemented. My past projects utilizing Django and GraphQL have specifically focused on user authentication, and I've been able to tackle similar issues by fixing schemas as necessary. This project is essentially a tailor-made challenge for me.
To add to that, my expertise extends to not only fixing the problem at hand but also ensuring that performance is optimized even after implementing solutions. I have extensive knowledge and experience in database design and improving performance bottlenecks, skills that would come in handy when troubleshooting your issue.
Furthermore, my proficiency stretches into DevOps on AWS, GCP, Azure etc., deploying with Docker and utilizing CI/CD tools like Kubernetes, Ansible, Terraform etc. - all of which could prove helpful should we need to explore potential server or infrastructure-related root causes for the problem you're experiencing. All in all, no one else comes to the table with my breadth of skills and this makes me an ideal choice for your project's successful completion.