You can solve this

[Eduardo-Vieira]

My APP needs to support up to 19, has how to libiner what is <23

Manifest merger failed : uses-sdk:minSdkVersion 19 cannot be smaller than version 23 declared in library [com.github.JesusM:FingerprintManager:v2.0.2] /home/eduardo/.gradle/caches/transforms-1/files-1.1/FingerprintManager-v2.0.2.aar/7c2037e20af6bfd8e3c14bd469d6281f/AndroidManifest.xml as the library might be using APIs not available in 19
Suggestion: use a compatible library with a minSdk of at most 19,
or increase this project's minSdk version to at least 23,
or use tools:overrideLibrary="com.jesusm.kfingerprintmanager" to force usage (may lead to runtime failures)