api: fix go vet warning
api: fix go vet warning

guilhermebr/tsuru,cgvarela/tsuru,hugoantunes/tsuru,hcxiong/tsuru,hugoantunes/tsuru,cezarsa/tsuru,Endika/tsuru,ArxdSilva/tsuru,ggarnier/tsuru,Endika/tsuru,RichardKnop/tsuru,firebitsbr/tsuru,tsuru/tsuru,ArxdSilva/tsuru,RichardKnop/tsuru,gwmoura/tsuru,ArxdSilva/tsuru,tsuru/tsuru,cezarsa/tsuru,gciotta/tsuru,guilhermebr/tsuru,cezarsa/tsuru,ggarnier/tsuru,gciotta/tsuru,tuxmonteiro/tsuru,ArxdSilva/tsuru,guilhermebr/tsuru,guilhermebr/tsuru,4eek/tsuru,tsuru/tsuru,gciotta/tsuru,Endika/tsuru,tsuru/tsuru,kgrvamsi/tsuru,cgvarela/tsuru,kgrvamsi/tsuru,hcxiong/tsuru,ggarnier/tsuru,kgrvamsi/tsuru,cgvarela/tsuru,RichardKnop/tsuru,jblancett/tsuru,jblancett/tsuru,hcxiong/tsuru,mderaldo/tsuru,firebitsbr/tsuru,tuxmonteiro/tsuru,cezarsa/tsuru,4eek/tsuru,firebitsbr/tsuru,mderaldo/tsuru,mderaldo/tsuru,4eek/tsuru,tuxmonteiro/tsuru,gwmoura/tsuru,gwmoura/tsuru,ggarnier/tsuru,jblancett/tsuru