JESUS disciples used His name when they healedand casted out demons as they spoke and acted in His place and authority.
Yes believers have the same authority as the apostles I am always encouraged when reading John 17:20-23 knowing my strength and help is coming from the Master.
The power of attorney is given to all disciples by Jesusforwhen we praying His name we are acting on behalf of His kingdom
Sometimes we are afraid to speak or act in Jesus' name because of rejection from others, peer pressure, threats from others, ashamed of the Gospel of Jesus Christ, lack of faith and trust and lifestyles that do not reflect the true teachings of the bible.
Hearing the voice of JESUS can alleviate fear testing out faith and obedience to follow Him no matter what.