app/util/jwt_util.rb:6:in `encode'
app/controllers/users_controller.rb:21:in `login'
Started POST "/users/login" for ::1 at 2018-06-04 02:07:42 +0200
Processing by UsersController#login as JSON
  Parameters: {"email"=>"vladislavk2@yahoo.com", "password"=>"[FILTERED]", "user"=>{"email"=>"vladislavk2@yahoo.com", "password"=>"[FILTERED]"}}
MONGODB | localhost:27017 | gibanica_development.find | STARTED | {"find"=>"users", "filter"=>{"email"=>"vladislavk2@yahoo.com"}, "sort"=>{"_id"=>1}, "limit"=>1, "singleBatch"=>true, "lsid"=>{"id"=><BSON::Binary:0x70177568353840 type=uuid data=0xe194986821be40be...>}}
MONGODB | localhost:27017 | gibanica_development.find | SUCCEEDED | 0.000881s
MONGODB | localhost:27017 | gibanica_development.find | STARTED | {"find"=>"roles", "filter"=>{"$and"=>[{"_id"=>{"$in"=>[BSON::ObjectId('5b147cf59f5c552a185a2523'), BSON::ObjectId('5b147d5c9f5c552a185a26b6'), BSON::ObjectId('5b147dc59f5c552a185a2849'), BSON::ObjectId('5b147dd19f5c552a185a29dc'), BSON::ObjectId('5b14...
MONGODB | localhost:27017 | gibanica_development.find | SUCCEEDED | 0.001093s
Completed 500 Internal Server Error in 95ms



TypeError (no implicit conversion of nil into String):

app/util/jwt_util.rb:6:in `encode'
app/controllers/users_controller.rb:21:in `login'