OAuth issue in Grails - grails

Question

I am tyring to configure login using twitter in my grails application
getting this stack trace when i do run-app
Server running. Browse to http://localhost:8080/TestOAuth
Error initializing the application: Error creating bean with name 'uk.co.desirableobjects.oauth.scribe.OauthController': Initialization of bean failed;<br/>
nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'oauthService': Invocation of init method failed; nested exception is uk.co.desirableobjects.oauth.scribe.exception.InvalidOauthProviderException: [:] is not a Class <br/>
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'uk.co.desirableobjects.oauth.scribe.OauthController': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'oauthService': Invocation of init method failed; nested exception is uk.co.desirableobjects.oauth.scribe.exception.InvalidOauthProviderException: [:] is not a Class
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
at java.util.concurrent.FutureTask.run(FutureTask.java:166)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:722) <br/>
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'oauthService': Invocation of init method failed; nested exception is uk.co.desirableobjects.oauth.scribe.exception.InvalidOauthProviderException: [:] is not a Class
... 5 more <br/>
Caused by: uk.co.desirableobjects.oauth.scribe.exception.InvalidOauthProviderException: [:] is not a Class
at uk.co.desirableobjects.oauth.scribe.OauthService.afterPropertiesSet(OauthService.groovy:48)
... 5 more
| Error Forked Grails VM exited with error
this is what i configured for twitter
oauth {
providers {
twitter {
api = 'TwitterApi'
key = 'i have my key here'
secret = 'i have my secrete key here'
successUri = '/success.gsp'
failureUri = '/fail.gsp'
}
}
debug = true
}

Answer 1

The provider API is a class (from scribe API) instead of String, which has to be referred in the config.
import org.scribe.builder.api.TwitterApi
oauth {
providers {
twitter {
api = TwitterApi
key = 'i have my key here'
secret = 'i have my secrete key here'
successUri = '/success.gsp'
failureUri = '/fail.gsp'
}
}
debug = true
}