go - How to integrate Oauth2 using golang? -


i have rest api created in golang works encrypted key authenticate requests. want integrate oauth2 authentication. couldn't find proper tutorial integrate oauth2 in project. have login api handler written in golang.

func userlogin(c *gin.context){     response := responsecontroller{}     var userdata userloginstruct      usererr := json.newdecoder(c.request.body).decode(&userdata)      if usererr != nil {         response = responsecontroller{             config.failurecode,             config.failureflag,             "data not in proper format",             nil,         }         getresponse(c, response)         return     }     var err error     usersaveddata, getusererror := models.getcompleteuser(bson.m{"email_id": userdata.username})     if getusererror != nil{         response = responsecontroller{             config.failurecode,             config.failureflag,             "invalid email",             nil,         }         getresponse(c, response)         return     }      //hashedpassword     err = bcrypt.comparehashandpassword([]byte(usersaveddata.password), []byte(userdata.password))     var sessiondata models.session     sessiondata.userid = usersaveddata.id     sessiondata.role = usersaveddata.role     sessiondata.createdon = time.now().unix()      if err != nil {         response = responsecontroller{             config.failurecode,             config.failurecode,             config.failuremsg,             nil,         }     } else {         _ = models.savesession(sessiondata)         usersaveddata.password = ""         _ = models.updateuser(usersaveddata.id, bson.m{"$set": &models.user{lastlogin: time.now().unix()}})         response = responsecontroller{             config.successcode,             config.successflag,             config.successmsg,             usersaveddata,         }     }     getresponse(c, response) }

this handler checks user credentials email , password , if right session created. how can use token based system using oauth2 handler?

thanks!


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