Feat- implelented Agora token generator for Agora engine authentication

[taiwonaf]

-Created an end point to generate Agora RTC token base on users

• Channelname role tokenType *uid
• Fixed token expiration of 2 hours
• Endpoint = {{url}}/rtc/{channelName}/{role}/{tokentype}/{uid}/
• role = "publisher" or "subscriber" string
• tokentype = "userAccount" or "uid" string
• uid= integer
• channelName = string

[mikengr]

@Aminujb @NwokoyeChigozie please review this PR

[NwokoyeChigozie]

Jb will review it, he is the owner of this repository

[Aminujb]

I have lost admin access to this Repo!