Following publish instructions form GitHub documentation: https://docs.github.com/en/free-pro-team@latest/actions/guides/publishing-java-packages-with-gradle

Author: Chessray

.github/workflows/gradle.yml

@@ -23,4 +23,7 @@ jobs:
     - name: Grant execute permission for gradlew
       run: chmod +x gradlew
     - name: Build with Gradle
-      run: ./gradlew build -PossrhUsername=${{ secrets.OSSRHUSERNAME }} -PossrhPassword=${{ secrets.OSSRHPASSWORD }}
+      run: ./gradlew build
+      env:
+        OSSRH_USERNAME: ${{ secrets.OSSRH_USERNAME }}
+        OSSRH_PASSWORD: ${{ secrets.OSSRH_PASSWORD }}

annotations/build.gradle

@@ -52,8 +52,8 @@ publishing {
             url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
 
             credentials {
-                username = "${ossrhUsername}"
-                password = "${ossrhPassword}"
+                username = System.getenv("OSSRH_USERNAME")
+                password = System.getenv("OSSRH_PASSWORD")
             }
         }
     }

extensions/build.gradle

@@ -60,8 +60,8 @@ publishing {
             url = version.endsWith('SNAPSHOT') ? snapshotsRepoUrl : releasesRepoUrl
 
             credentials {
-                username = "${ossrhUsername}"
-                password = "${ossrhPassword}"
+                username = System.getenv("OSSRH_USERNAME")
+                password = System.getenv("OSSRH_PASSWORD")
             }
         }
     }