sudo make run_tests 
./transcribe -b 16000 resources/audio.raw
E0205 18:55:48.361527397    3233 google_default_credentials.cc:350] Could not create google default credentials: {"created":"@1549373148.360106566","description":"Failed to create Google credentials","file":"src/core/lib/security/credentials/google_default/google_default_credentials.cc","file_line":284,"referenced_errors":[{"created":"@1549373148.360126434","description":"Failed to load file","file":"src/core/lib/iomgr/load_file.cc","file_line":71,"filename":"home/rohan/Downloads/proven-caster-222406-5522480516c5.json","referenced_errors":[{"created":"@1549373148.360123641","description":"No such file or directory","errno":2,"file":"src/core/lib/iomgr/load_file.cc","file_line":45,"os_error":"No such file or directory","syscall":"fopen"}]},{"created":"@1549373148.360135072","description":"Failed to load file","file":"src/core/lib/iomgr/load_file.cc","file_line":71,"filename":"/root/.config/gcloud/application_default_credentials.json","referenced_errors":[{"created":"@1549373148.360134709","description":"No such file or directory","errno":2,"file":"src/core/lib/iomgr/load_file.cc","file_line":45,"os_error":"No such file or directory","syscall":"fopen"}]}]}
lame client channel
make: *** [Makefile:63: run_tests] Error 255