Add initial Microsoft Teams support

Documentation on https://github.com/42wim/matterbridge/wiki/MS-Teams-setup

vendor/github.com/yaegashi/msgraph.go/beta/AttributeDefinitionModel.go

@@ -0,0 +1,31 @@
+// Code generated by msgraph-generate.go DO NOT EDIT.
+
+package msgraph
+
+// AttributeDefinition undocumented
+type AttributeDefinition struct {
+	// Object is the base model of AttributeDefinition
+	Object
+	// Anchor undocumented
+	Anchor *bool `json:"anchor,omitempty"`
+	// APIExpressions undocumented
+	APIExpressions []StringKeyStringValuePair `json:"apiExpressions,omitempty"`
+	// CaseExact undocumented
+	CaseExact *bool `json:"caseExact,omitempty"`
+	// DefaultValue undocumented
+	DefaultValue *string `json:"defaultValue,omitempty"`
+	// Metadata undocumented
+	Metadata []MetadataEntry `json:"metadata,omitempty"`
+	// Multivalued undocumented
+	Multivalued *bool `json:"multivalued,omitempty"`
+	// Mutability undocumented
+	Mutability *Mutability `json:"mutability,omitempty"`
+	// Name undocumented
+	Name *string `json:"name,omitempty"`
+	// Required undocumented
+	Required *bool `json:"required,omitempty"`
+	// ReferencedObjects undocumented
+	ReferencedObjects []ReferencedObject `json:"referencedObjects,omitempty"`
+	// Type undocumented
+	Type *AttributeType `json:"type,omitempty"`
+}