21. On stackoverflow
Basically if the currentUserDoc is nil then it won't proceed to get the document if
it's empty and then the app doesn't crash.
When you check if the user is logged in but no document was written yet and
you still try to read it, it returns nil and that causes a crash.
https://stackoverflow.com/questions/69608266/ios-firestore-document-path-cannot-be-empty
24. *** Terminating app due to uncaught exception
'FIRInvalidArgumentException', reason: 'Collection path
cannot be empty.'
메인에서는 작동이 잘 되었지만, 다른 브랜치에서는 작동이 안되는 상황
28. What’s in pbjxproj
/* Begin PBXFileReference section */
// !$*UTF8*$!
/* Begin PBXBuildFile section */
/* Begin PBXCopyFilesBuildPhase section */
/* Begin PBXFrameworksBuildPhase section */
/* Begin PBXGroup section */
/* Begin PBXNativeTarget section */
/* Begin PBXProject section */
/* Begin PBXResourcesBuildPhase section */
/* Begin PBXShellScriptBuildPhase section */
/* Begin PBXSourcesBuildPhase section */
29. And so on
/* Begin XCBuildConfiguration section */
/* Begin XCConfigurationList section */
/* Begin XCRemoteSwiftPackageReference section */
/* Begin XCSwiftPackageProductDependency section */