class_docstr: This handler handles connection and execution of the Couchbase statements.
docstr: Get a list with of collection in database
docstr_tok: ["Get","a","list","with","of","collection","in","database"]
code: def get_tables(self) -> Response:
      """
      Get a list with of collection in database
      """
      cluster = self.connect()
      bucket = cluster.bucket(self.bucket_name)
      unique_collections = set()
      for scope in bucket.collections().get_all_scopes():
          for collection in scope.collections:
              unique_collections.add(collection.name)
      collections = list(unique_collections)
      df = pd.DataFrame(collections, columns=["TABLE_NAME"])
      response = Response(RESPONSE_TYPE.TABLE, df)
  
      return response
  
imports: from datetime import timedelta
  from collections import OrderedDict
  from mindsdb.integrations.libs.base import DatabaseHandler
  from mindsdb.utilities import log
  from mindsdb_sql.parser.ast.base import ASTNode
  import pandas
  from mindsdb.integrations.libs.const import HANDLER_CONNECTION_ARG_TYPE
  from mindsdb.integrations.libs.response import HandlerStatusResponse, HandlerResponse, RESPONSE_TYPE
  from couchbase.auth import PasswordAuthenticator
  from couchbase.cluster import Cluster
  from couchbase.exceptions import UnAmbiguousTimeoutException
  from couchbase.options import ClusterOptions
  from couchbase.exceptions import KeyspaceNotFoundException, CouchbaseException
label_desc: Use image node_id 7 for calling the CouchbaseHandler obj's underlying member method code with example usage: obj.get_tables() and returns: response