mvn clean install -Psign,testflightInternal

<profiles>
    <profile>
        <id>testflightInternal</id>
        <properties>
            <testflight.ApiToken>your api token</testflight.ApiToken>
            <testflight.TeamToken>your team-specific token</testflight.TeamToken>
            <testflight.DistroList>your team-specific distro list</testflight.DistroList>
            <testflight.NotifyDistroList>true or false</testflight.NotifyDistroList>
            <testflight.TestFlightBuildNotes>some build notes</testflight.TestFlightBuildNotes>
        </properties>
        <build>
            <plugins>
                <plugin>
                    <groupId>com.willowtreeapps.maven.plugins</groupId>
                    <artifactId>maven-testflight-plugin</artifactId>
                    <version>1.0.3</version>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>upload</goal>
                            </goals>
                            <configuration>
                                <testFlightApiToken>${testflight.ApiToken}</testFlightApiToken>
                                <testFlightTeamToken>${testflight.TeamToken}</testFlightTeamToken>
                                <testFlightDistroList>${testflight.DistroList}</testFlightDistroList>
                                <testFlightNotifyDistroList>${testflight.NotifyDistroList}</testFlightNotifyDistroList>
                                <testFlightBuildNotes>${testflight.TestFlightBuildNotes}</testFlightBuildNotes>
                                <filePath>${project.build.directory}/${project.build.finalName}-signed-aligned.apk</filePath>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>

    <profile>
        <id>testflightExternal</id>
        <properties>
            <testflight.ApiToken>your api token</testflight.ApiToken>
            <testflight.TeamToken>your team-specific token</testflight.TeamToken>
            <testflight.DistroList>your team-specific distro list</testflight.DistroList>
            <testflight.NotifyDistroList>true or false</testflight.NotifyDistroList>
            <testflight.TestFlightBuildNotes>some build notes</testflight.TestFlightBuildNotes>
        </properties>
        <build>
            <plugins>
                <plugin>
                    <groupId>com.willowtreeapps.maven.plugins</groupId>
                    <artifactId>maven-testflight-plugin</artifactId>
                    <version>1.0.3</version>
                    <executions>
                        <execution>
                            <phase>package</phase>
                            <goals>
                                <goal>upload</goal>
                            </goals>
                            <configuration>
                                <testFlightApiToken>${testflight.ApiToken}</testFlightApiToken>
                                <testFlightTeamToken>${testflight.TeamToken}</testFlightTeamToken>
                                <testFlightDistroList>${testflight.DistroList}</testFlightDistroList>
                                <testFlightNotifyDistroList>${testflight.NotifyDistroList}</testFlightNotifyDistroList>
                                <testFlightBuildNotes>${testflight.TestFlightBuildNotes}</testFlightBuildNotes>
                                <filePath>${project.build.directory}/${project.build.finalName}-signed-aligned.apk</filePath>
                            </configuration>
                        </execution>
                    </executions>
                </plugin>
            </plugins>
        </build>
    </profile>
</profiles>