Rename ConanToken's #to_s to #to_jwt to be more explicit

ee/lib/api/conan_packages.rb

@@ -20,7 +20,8 @@ module API
         detail 'This feature was introduced in GitLab 12.2'
       end
       get 'authenticate' do
-        ::Gitlab::ConanToken.from_personal_access_token(access_token)
+        token = ::Gitlab::ConanToken.from_personal_access_token(access_token)
+        token.to_jwt
       end
     end
 

ee/lib/gitlab/conan_token.rb

@@ -31,7 +31,7 @@ module Gitlab
       @user_id = user_id
     end
 
-    def to_s
+    def to_jwt
       hmac_token.encoded
     end
 

ee/spec/lib/gitlab/conan_token_spec.rb

@@ -46,7 +46,7 @@ describe Gitlab::ConanToken do
     end
   end
 
-  describe '#to_s' do
+  describe '#to_jwt' do
     it 'returns the encoded JWT' do
       allow(SecureRandom).to receive(:uuid).and_return('u-u-i-d')
 
@@ -55,7 +55,7 @@ describe Gitlab::ConanToken do
 
         token = described_class.new(personal_access_token_id: 123, user_id: 456)
 
-        expect(token.to_s).to eq(jwt.encoded)
+        expect(token.to_jwt).to eq(jwt.encoded)
       end
     end
   end