Caused by: io.jsonwebtoken.security.WeakKeyException: The specified key byte array is 144 bits which is not secure enough for any JWT HMAC-SHA algorithm.  The JWT JWA Specification (RFC 7518, Section 3.2) states that keys used with HMAC-SHA algorithms MUST have a size >= 256 bits (the key size must be greater than or equal to the hash output size).  Consider using the io.jsonwebtoken.security.Keys#secretKeyFor(SignatureAlgorithm) method to create a key guaranteed to be secure enough for your preferred HMAC-SHA algorithm.  See https://tools.ietf.org/html/rfc7518#section-3.2 for more information.
	at app//io.jsonwebtoken.security.Keys.hmacShaKeyFor(Keys.java:96)
	at app//com.woowacourse.auth.support.JwtTokenProvider.<init>(JwtTokenProvider.java:23)

SecretKey secretKey = Keys.secretKeyFor(SignatureAlgorithm.HS256);
String secretString = Encoders.BASE64.encode(secretKey.getEncoded());