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Third party libraries that use Keycloak REST APIs, for example Keycloak Admin Ruby
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Judoscale
Save 47% on cloud hosting with autoscaling that just works. Judoscale integrates with Rails, Sidekiq, Solid Queue, and more to make autoscaling easy and reliable. Save big, and say goodbye to request timeouts and backed-up job queues.
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Terraform or opentofu using terraform-provider
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Use devise gem, which is probably the most famous rails authentication system.
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Use revise gem, which is very similar to devise gem.
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You can use doorkeeper gem. Which can convert your Rails application into an identity provider. But this means that one of your applications will be the single source of truth for users management.
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CanCanCan.
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Pundit.
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InfluxDB
InfluxDB high-performance time series database. Collect, organize, and act on massive volumes of high-resolution data to power real-time intelligent systems.