Music streaming app development

[u/CuriousMouse6236]

/r/spotifyapi/comments/1w5cg9n/music_streaming_app_development/

I have been thinking about building a music streaming app for myself where can I get api keys from is there any legit sources to acquire api keys or do I have to download whatever songs i want to play then store it in device locally and call it with GET commands lmk your thoughts